Improvement in spindle-fasteners for locks and latches



: -A..JOHNSON.

Spindle-Fastener for Looks & Latches.

No. 203,160. Patented Apr i|3O,1878.1

"UNITED STATES PATENT-OFFICE- ALoNso JoHNsoN, OF SPRINGFIELD,MASSACHUSETTS.

IMPROVEMENT m SPlNDLE-FASIENERS FOR LOCKS AND LA-TCHES.

Specification forming part of Letters Patent No. 203,160, dated April30, 1878; application filed March 18, 1878.

any description, making a secure inside fastening for any door uponwhich it may be ap plied without the use of a lock and key.

I am aware that devices for effecting the above-named object have beenapplied to lockspindles; but, owing to their construction andapplication to the spindle and lock, they have not, to a sufficientdegree, possessed the elements of strength and security which are quitedesirable in mechanical combinations arranged for this purpose.Therefore I construct the parts of my spindle-lock of a few strongmetallic pieces, firmly attached to each other and to the spindle, andthe locking-tumbler is so tightly secured to the spindle under theinside rosette and latch-holder by a set-screw that the spindle, cannotbe easily removed from the lock by operating outside the door, and mylocking parts are strong enough to resist any effort to draw back thelock-bolt by turning the outside knob; so my devices provide almostperfect security for the purpose for which they are intended.

In the drawings, which consist of three figures, like letters refer tolike parts in the different figures. V

Figure l is a perspective view ofmy lock as applied to a door,with theinside knob removed to more perfectly show the inside rosette or case A.Fig. 2 is a plane view of the parts embraced in my improvement, with aportion of the case A broken away, disclosing the spindle-locking partsin the position they assume when the spindle is locked. Fig. 3 is asectional elevation of the lock, showing all the parts in section exceptthe latch O and tumbler B.

A is the latch and tumbler-case. B is the tumbler. G is thespindle-latch. a isthe orh dinary mortise-lock spindle, to which tumblerB and the knobs D and E are attached in the usual manner. b is the hubof the knob D. d is a set-screw which fastens the tumbler B onto spindlea.

The essential parts of my invention are the latch and tumbler-case A,the tumbler B, and the latch G. The said tumbler B is firmly attached tothe spindle a, and rotates with it, and has a notch,i, in its edge forreceiving the point of latch 0.

After the latch-lock has been mortised into the door, I insert thespindle a from the outside of the door through the latter and throughthe latch-lock.

On the inside of the door, in place of the ordinary rosette, I fastenthe latch-case A, to which is hung latch C, first slipping the tumbler Bover the end of the spindle or against the door, and securing it thereonin proper place by a set-screw, d, and then secure the inside knob Eonto the end of the spindle a in the usual manner.

With the parts assembled as above set forth, the tumbler B stands in theposition shown in Fig. 2, latch O is hung on the upper ear of case A, asshown in Figs. 1 and 2, or elsewhere on the case or rosette, so it canbe freely turned up or back in a position similar to that shown by thedotted lines in Fig. 2, or thrown clear over backward when the spindleis unlocked; and when it is desired to prevent the spindle a from beingturned to draw back the bolt of the latch, latch O is turned over andallowed to fall into the notch i in tumbler B, as seen in Fig. 2.Tumbler B is.a metallic piece, in which is a square hole for theinsertion of spindle a and a notch, 2', to receive the locking-point oflatch O, and is secured to said spindle a by a set-screw,d, asheretofore shown and set forth. Latch G is a metallic piece hung uponone of theears of latch-case A.

My improved spindle-lock presents another advantage over the devicesheretofore made for this purposeviz, that a door to which is attached myimprovements can be locked from the outside in the following manner,viz: first, turn latch "0 over onto the tumbler B, and in passing out ofthe room let the knob be turned down so as to retain the door-latchin'the lock, and, so held, the point of latch C will .fall to one sideof tumbler B, and as soon as'the door is closedand the knob released itwill spring over, carrying the side of the tumbler hard enough againstlatch O to lift it up, and as soon as the notch 01 in said tumblerswings under the point of said latch the latter falls into said notch,and the spindle is locked so it cannot be turned. Thus, if the latch Ois left lying on tumbler B, or either side-of it,

the door-latch operates to lock itself automatically as soon as the knobis released.

It is obvious that, were latch 0 made with a notch, a, in=it and tumblerB with a tooth on its upper edge to fit said notch,'the operation of theparts would be essentially the same.

What I claim as my invention is The combination, with the spindle a, ofcase A, latch O, and tumbler B, substantially as set forth.

ALONSO JOHNSON.

Witnesses H. AHJHAPIN, WM. H. CHAPIN.

